Question

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□ Gravitation

Assuming the earth to be a sphere of uniform mass density, how much would a body weigh half way down to the centre of the earth if it weighed 250 N on the surface?​

Answer 1

Explanation:

We know,

acc" due to gravity at depth h from earth's surface,

g=go(1-h/r) here, hr/2

g=go(1-r/2r) = go/2

Now, weight of body at the surface of the earth = 250N = mgo

hence, weight of body at depth R/2 = mgo/2= 250/2 = 125 N

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